Table 2-3. PCL Feature Additions for HP LaserJet 4

Feature/Command

Support

Comments

Adaptive Compression System

New

Adaptive compression system enables the printer to

 

 

compress internal raster data when memory becomes low.

 

 

This operation occurs automatically; there are no PCL

 

 

commands for this feature (refer to Chapter 5 for ADC

 

 

information).

Configuration Command

New

Allows PCL jobs to be printed (using LocalTalk or

 

 

EtherTalk MIO) using AppleTalk protocol.

Number of Copies

Modified

Supports 1-32,767 copies as does the HP LaserJet IIISi

 

 

printer.

Units of Measure Command

New

Allows selection of the units of measure for cursor moves,

 

 

drawing rules, and for character spacing (font metrics).

Page Size

Modified

A parameter value is added for B5 envelope size; the HP

 

 

LaserJet 4 printer supports the four standard paper sizes

 

 

and five envelope sizes.

Bitmap Font Support

New Header

Printer will expand 300 dpi bitmap fonts to 600 dpi. A new

 

 

300/600 dpi bitmap font descriptor has been added to

 

 

allow bitmap fonts to be created that work at either 1/300

 

 

or 1/600 inch printer resolution.

Scalable Font Support

New Header

A new Universal header has been added to allow design of

 

 

typefaces of different scaling technologies to be supported

 

 

by one header. This header is used to support TrueType on

 

 

the HP LaserJet 4 printer. (This header will be used to

 

 

support any other new scaling technologies HP may add in

 

 

the future).

True Type

New

TrueType scaling technology support has been added to

 

 

the printer.

Internal Typefaces

New

Several new Intellifont and TrueType internal typefaces

 

 

(and supporting symbol sets) are now provided in the

 

 

printer.

Raster Resolution Command

Modified

Parameter values have been added to support raster

 

 

resolutions of 200 dpi and 600 dpi.

User-defined Pattern

New Header

A new 300/600 dpi user-defined pattern header has been

 

 

added to support patterns that work at either 1/300 or

 

 

1/600 inch printer resolution.

Continued on next page.

Printer-Specific Differences 2-5